Day by Day, good job keeping up with GAL and 180! My short answer is keep doing what you are doing. He has threatened to file but hasn't done it yet. He is most likely defensive because you and his work (recently)found out about the A.
How often do you and the kids see him? How have you been acting toward him? What changes have you made that you hope he will notice?
I, too,do not want to divorce and do not want OW to see my baby but just started consulting a DB coach and am tolerating WH to take him to her Saturday mornings. Why? Because it is a 180 of what he would expect. I am not making any drastic moves until after the holidays and then will reevaluate based on results (I have noticed small positive changes in my WH's behavior over the last couple of weeks....)
me,34 exH,34 S,16 months S:3/31/09-left for OW started DBing 10/09 d final: sometime 10/10 current: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2022856&page=1 met in 2004